Novel salicylaldehyde derivatives as fluorescence turn-on sensors for cyanide ion
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Author list: Niamnont N., Khumsri A., Promchat A., Tumcharern G., Sukwattanasinitt M.
Publisher: Elsevier
Publication year: 2014
Journal: Journal of Hazardous Materials (0304-3894)
Volume number: 280
Start page: 458
End page: 463
Number of pages: 6
ISSN: 0304-3894
eISSN: 1873-3336
Languages: English-Great Britain (EN-GB)
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Abstract
A novel series of fluorescent probes containing diphenylacetylene as fluorogenic units and salicylaldehyde as a CN- receptor were successfully synthesized by using sonogashira coupling. In the presence of Triton-X 100 non-ionic surfactant, the fluorophores exhibited fluorescence "turn-on" in response to CN- in aqueous media with the detection limit of 1.6μM. The turn-on signal is the result of the conversion of the aldehyde to cyanohydrin via the internal acid catalyzed addition of cyanide. Using paper sensor strips, a naked eye detection of cyanide is possible down to 5nmol. © 2014 Elsevier B.V.
Keywords
Nucleophilic addition, Water analysis